But I don't know about wallets. I don't know how to use wallets properly. Which wallet should I use to invest in Bitcoin? And what should I do? 
I want to know about wallets.
You don’t use a wallet to invest in Bitcoin; you use a wallet to store and safeguardyour Bitcoin, and the best wallet you can use and that’s recommended is an open-source wallet. You can go for electrum wallet, BlueWallet Electrum Wallet or BlueWallet, which are both mobile-friendly wallets and easy to use. I want to know about wallets.I want to call your attention respectfully that Bitcoin wallet doesn't store Bitcoin, your Bitcoin exist on the blockchain network. What Bitcoin wallets does for you is it helps you manage your Bitcoin and Bitcoin address and other things you said. Like send, receive and do other things with your private keys or seed phrase.